{"id":53221,"date":"2026-05-15T09:46:45","date_gmt":"2026-05-15T09:46:45","guid":{"rendered":"https:\/\/zobai.com\/?page_id=53221"},"modified":"2026-05-15T09:48:21","modified_gmt":"2026-05-15T09:48:21","slug":"lng","status":"publish","type":"page","link":"https:\/\/zobai.com\/fr\/applications\/lng\/","title":{"rendered":"GNL"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"53221\" class=\"elementor elementor-53221\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-50b0f7ec e-con-full e-flex cmsmasters-bg-hide-none cmsmasters-bg-hide-none cmsmasters-block-default e-con e-parent\" data-id=\"50b0f7ec\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-34c30cb0 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"34c30cb0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2887a3de cmsmasters-breadcrumbs-alignment-left cmsmasters-breadcrumbs-type-rank cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-cmsmasters-breadcrumbs cmsmasters-widget-breadcrumbs\" data-id=\"2887a3de\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"cmsmasters-breadcrumbs.default\">\n\t\t\t\t\t<div class=\"cmsmasters-widget-breadcrumbs__container\"><div class=\"cmsmasters-widget-breadcrumbs__content\"><nav aria-label=\"breadcrumbs\" class=\"rank-math-breadcrumb\"><p><span class=\"last\">Home<\/span><\/p><\/nav><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-60644759 elementor-widget__width-initial cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"60644759\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;cmsmasters-fade-in-up&quot;,&quot;_animation_delay&quot;:150}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">LNG Safety Valves for Cryogenic Storage, Liquefaction, Regasification, BOG and Loading Systems<\/h1>\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-93630bc e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"93630bc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4e784d2 cmsmasters-button-mobile-align-center cmsmasters-icon-arrangement-together cmsmasters-block-default cmsmasters-sticky-default elementor-invisible elementor-widget elementor-widget-cmsmasters-button\" data-id=\"4e784d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;cmsmasters-pop-in&quot;,&quot;_animation_delay&quot;:300}\" data-widget_type=\"cmsmasters-button.default\">\n\t\t\t\t\t<div class=\"elementor-widget-cmsmasters-button__button-container\"><div class=\"elementor-widget-cmsmasters-button__button-container-inner\"><a href=\"https:\/\/zobai.com\/fr\/?page_id=48437\" class=\"cmsmasters-button-link elementor-widget-cmsmasters-button__button cmsmasters-icon-view-default cmsmasters-icon-shape- cmsmasters-button-size-sm\" role=\"button\" tabindex=\"0\"><span class=\"elementor-widget-cmsmasters-button__content-wrapper cmsmasters-align-icon-right\"><span class=\"elementor-widget-cmsmasters-button__icon\"><i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i><\/span><span class=\"elementor-widget-cmsmasters-button__text\">CONTACT SALES<\/span><\/span><\/a><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cd92a1 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"cd92a1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-212833b0 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"212833b0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-681d8280 e-con-full cmsmasters-effect cmsmasters-effect-type-transform e-flex cmsmasters-effect-hover-type-element cmsmasters-block-default e-con e-child\" data-id=\"681d8280\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;position&quot;:&quot;absolute&quot;,&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-35c0963a e-con-full e-flex cmsmasters-block-default e-con e-parent\" data-id=\"35c0963a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1cd3a6fc cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-html\" data-id=\"1cd3a6fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>\r\n  .zobai-lng-page {\r\n    --z-green: #0fad87;\r\n    --z-green-dark: #087761;\r\n    --z-ink: #20242a;\r\n    --z-muted: #66727f;\r\n    --z-bg: #f3f4f5;\r\n    --z-card: #ffffff;\r\n    --z-line: #e3e8ec;\r\n    --z-soft: #eef8f5;\r\n    --z-dark: #102522;\r\n    --z-radius: 22px;\r\n    font-family: inherit;\r\n    color: var(--z-ink);\r\n    background: var(--z-bg);\r\n  }\r\n\r\n  .zobai-lng-page * { box-sizing: border-box; }\r\n\r\n  .zobai-lng-section {\r\n    max-width: 100%;\r\n    margin: 0 auto;\r\n    padding: 88px 80px;\r\n  }\r\n\r\n  .zobai-lng-section-soft { background: #f8faf9; }\r\n\r\n  .zobai-lng-eyebrow {\r\n    display: inline-flex;\r\n    align-items: center;\r\n    gap: 8px;\r\n    color: var(--z-green);\r\n    font-size: 13px;\r\n    font-weight: 800;\r\n    letter-spacing: 0.14em;\r\n    text-transform: uppercase;\r\n    margin-bottom: 18px;\r\n  }\r\n\r\n  .zobai-lng-eyebrow:before {\r\n    content: \"\u203a\u203a\u203a\";\r\n    color: var(--z-green);\r\n    font-size: 20px;\r\n    letter-spacing: -2px;\r\n  }\r\n\r\n  .zobai-lng-title {\r\n    font-size: clamp(34px, 5vw, 76px);\r\n    line-height: 1.04;\r\n    letter-spacing: -0.04em;\r\n    margin: 0 0 26px;\r\n    color: var(--z-ink);\r\n    max-width: 1120px;\r\n  }\r\n\r\n  .zobai-lng-lead {\r\n    font-size: clamp(17px, 1.5vw, 21px);\r\n    line-height: 1.75;\r\n    color: #35404a;\r\n    max-width: 1120px;\r\n    margin: 0 0 34px;\r\n  }\r\n\r\n  .zobai-lng-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(12, 1fr);\r\n    gap: 28px;\r\n  }\r\n\r\n  .zobai-lng-span-4 { grid-column: span 4; }\r\n  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center;\r\n    justify-content: center;\r\n    flex: 0 0 34px;\r\n    margin-left: 16px;\r\n    transition: transform 0.2s ease;\r\n  }\r\n\r\n  .zobai-lng-acc-item.is-open .zobai-lng-acc-btn span { transform: rotate(45deg); }\r\n\r\n  .zobai-lng-acc-body {\r\n    display: none;\r\n    padding: 0 24px 24px;\r\n    color: #4a5661;\r\n    line-height: 1.72;\r\n    font-size: 16px;\r\n  }\r\n\r\n  .zobai-lng-acc-item.is-open .zobai-lng-acc-body { display: block; }\r\n\r\n  .zobai-lng-rfq {\r\n    background: linear-gradient(135deg, #09201d 0%, #0d6f5d 100%);\r\n    border-radius: 34px;\r\n    padding: 48px;\r\n    color: #fff;\r\n    display: grid;\r\n    grid-template-columns: 1.05fr 0.95fr;\r\n    gap: 36px;\r\n    align-items: center;\r\n  }\r\n\r\n  .zobai-lng-rfq h2 {\r\n    font-size: clamp(32px, 4vw, 56px);\r\n    line-height: 1.08;\r\n    letter-spacing: -0.04em;\r\n    color: #fff;\r\n    margin: 0 0 18px;\r\n  }\r\n\r\n  .zobai-lng-rfq p {\r\n    color: 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(max-width: 640px) {\r\n    .zobai-lng-section { padding: 58px 18px; }\r\n\r\n    .zobai-lng-card,\r\n    .zobai-lng-hero-panel,\r\n    .zobai-lng-rfq,\r\n    .zobai-lng-case {\r\n      padding: 26px 20px;\r\n      border-radius: 24px;\r\n    }\r\n\r\n    .zobai-lng-flow-item { grid-template-columns: 1fr; }\r\n    .zobai-lng-case-top { flex-direction: column; }\r\n    .zobai-lng-case-data { grid-template-columns: 1fr; }\r\n    .zobai-lng-rfq-grid { grid-template-columns: 1fr; }\r\n  }\r\n<\/style>\r\n\r\n<div class=\"zobai-lng-page\">\r\n\r\n  <section class=\"zobai-lng-section\">\r\n    <div class=\"zobai-lng-hero-panel\">\r\n      <div class=\"zobai-lng-eyebrow\">LNG Cryogenic Relief Service<\/div>\r\n      <h2>LNG Safety Valves for Cryogenic Storage, Liquefaction, Regasification, BOG and Loading Systems<\/h2>\r\n      <p>\r\n        LNG safety valves protect cryogenic storage tanks, LNG transfer lines, loading arms, unloading stations, LNG pumps, vaporizers, regasification skids, boil-off gas systems, BOG compressors, cold boxes, LNG fuel gas systems, bunkering skids and marine LNG packages from overpressure. Correct selection starts with set pressure, protected equipment MAWP, cryogenic temperature, blocked-in LNG thermal expansion, boil-off gas generation, fire exposure, vaporizer failure, two-phase flashing, back pressure, discharge destination, material toughness, extended bonnet requirement, seat tightness, insulation clearance and required cryogenic test documents.\r\n      <\/p>\r\n\r\n      <div class=\"zobai-lng-kpi\">\r\n        <div class=\"zobai-lng-kpi-item\">\r\n          <strong>Core Equipment<\/strong>\r\n          <span>LNG tanks, pumps, transfer lines, vaporizers, BOG compressors and loading systems<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lng-kpi-item\">\r\n          <strong>Key Relief Cases<\/strong>\r\n          <span>Blocked-in LNG, boil-off gas, fire case, vaporizer upset and pump deadhead<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lng-kpi-item\">\r\n          <strong>Engineering Focus<\/strong>\r\n          <span>Cryogenic material, thermal relief, flashing, cold discharge and safe venting<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lng-kpi-item\">\r\n          <strong>RFQ Output<\/strong>\r\n          <span>Datasheet, sizing basis, cryogenic material review, MTC and test reports<\/span>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section zobai-lng-section-soft\">\r\n    <div class=\"zobai-lng-eyebrow\">LNG Applications<\/div>\r\n    <h2 class=\"zobai-lng-title\">Where LNG Safety Valves Are Used<\/h2>\r\n    <p class=\"zobai-lng-lead\">\r\n      LNG relief service is different from ordinary natural gas service because the valve may see cryogenic liquid, cold vapor, flashing flow, rapid boil-off, trapped liquid expansion and low-temperature embrittlement risk. The valve must protect pressure equipment and remain reliable under very low temperature conditions.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-lng-grid\">\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>LNG Storage Tanks and Tank Piping<\/h3>\r\n        <p>\r\n          Used on storage tank nozzles, tank top vapor spaces, fill lines, withdrawal lines, recirculation lines and tank protection systems. Selection should review tank design pressure, boil-off rate, fire case, vacuum protection, emergency venting and cold vapor discharge.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>LNG Transfer Lines and Loading Arms<\/h3>\r\n        <p>\r\n          Used on loading lines, unloading arms, marine terminals, truck loading skids, bunkering systems and isolated cryogenic pipe sections. Thermal relief is critical when LNG can be trapped between closed valves and warmed by ambient heat.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>LNG Pumps and Send-Out Systems<\/h3>\r\n        <p>\r\n          Used on submerged pumps, high-pressure send-out pumps, recirculation systems and pump discharge headers. Valve selection should review pump curve, deadhead pressure, minimum flow, cold liquid flashing, vibration and discharge return route.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>Vaporizers and Regasification Skids<\/h3>\r\n        <p>\r\n          Used on ambient air vaporizers, open rack vaporizers, submerged combustion vaporizers, shell-and-tube vaporizers and regasification packages. Relief cases include blocked gas outlet, heat input upset, tube rupture and cold liquid isolation.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>Boil-Off Gas and Compressor Systems<\/h3>\r\n        <p>\r\n          Used on BOG headers, compressors, knockout drums, gas receivers and fuel gas conditioning systems. Selection should review low-temperature gas, compressor blocked discharge, suction pressure control, vent or flare back pressure and leakage tightness.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>LNG Fuel Gas and Marine Bunkering<\/h3>\r\n        <p>\r\n          Used on LNG fuel supply systems, marine bunkering skids, satellite stations, ISO container systems and small-scale LNG packages. Compact layouts require careful review of valve orientation, cold vent location, isolation policy and operator safety.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section\">\r\n    <div class=\"zobai-lng-eyebrow\">Relief Case Analysis<\/div>\r\n    <h2 class=\"zobai-lng-title\">LNG Safety Valve Selection Starts With Cryogenic Relief Scenario<\/h2>\r\n    <p class=\"zobai-lng-lead\">\r\n      LNG systems can overpressure through liquid expansion, boil-off, blocked outlet, pump deadhead, vaporizer upset, fire exposure or compressor failure. The selected relief device must match the phase, temperature and discharge system for the governing case.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-lng-flow\">\r\n      <div class=\"zobai-lng-flow-item\">\r\n        <div class=\"zobai-lng-flow-num\">01<\/div>\r\n        <div>\r\n          <h3>Blocked-In LNG Thermal Expansion<\/h3>\r\n          <p>\r\n            LNG trapped between closed valves can build pressure quickly as heat leaks into the line. Cryogenic thermal relief valves should be reviewed on loading lines, pump recirculation lines, vaporizer inlet lines and isolated pipe sections.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-flow-item\">\r\n        <div class=\"zobai-lng-flow-num\">02<\/div>\r\n        <div>\r\n          <h3>Boil-Off Gas Generation<\/h3>\r\n          <p>\r\n            Heat ingress into LNG storage, transfer lines or low-temperature equipment creates boil-off gas. Relief review should include normal BOG, emergency BOG, blocked vapor outlet and vent or flare system capacity.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-flow-item\">\r\n        <div class=\"zobai-lng-flow-num\">03<\/div>\r\n        <div>\r\n          <h3>LNG Pump Deadhead or Blocked Discharge<\/h3>\r\n          <p>\r\n            LNG pumps can overpressure discharge piping if the outlet is blocked or minimum flow path is unavailable. Selection should review pump curve, shutoff head, cold liquid flow, flashing behavior and return system back pressure.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-flow-item\">\r\n        <div class=\"zobai-lng-flow-num\">04<\/div>\r\n        <div>\r\n          <h3>Vaporizer Outlet Blockage<\/h3>\r\n          <p>\r\n            When LNG is vaporized and gas outlet flow is restricted, vaporizer pressure can rise. The relief case should consider heat input, LNG inlet flow, gas properties, cold-end isolation and downstream gas header pressure.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-flow-item\">\r\n        <div class=\"zobai-lng-flow-num\">05<\/div>\r\n        <div>\r\n          <h3>Fire Exposure and Emergency Relief<\/h3>\r\n          <p>\r\n            Storage vessels, process vessels, vaporizers and LNG piping may require fire-case relief review. Emergency discharge should be routed to an approved safe vent, flare or cold relief system.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-flow-item\">\r\n        <div class=\"zobai-lng-flow-num\">06<\/div>\r\n        <div>\r\n          <h3>Flashing, Two-Phase Flow and Cold Discharge<\/h3>\r\n          <p>\r\n            LNG relief may start as liquid and flash into vapor as pressure drops. Valve capacity, outlet piping, cold plume behavior, icing risk and discharge material compatibility should be reviewed together.\r\n          <\/p>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section zobai-lng-section-soft\">\r\n    <div class=\"zobai-lng-eyebrow\">Application Case Data<\/div>\r\n    <h2 class=\"zobai-lng-title\">LNG Safety Valve Application Cases with Typical RFQ Data<\/h2>\r\n    <p class=\"zobai-lng-lead\">\r\n      These cases show how LNG relief valve requirements are commonly described before model selection. Final sizing must be confirmed by project process data, LNG composition, protected equipment design, relief calculation, discharge system review and applicable code basis.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-lng-grid\">\r\n      <div class=\"zobai-lng-case zobai-lng-span-6\">\r\n        <div class=\"zobai-lng-case-top\">\r\n          <h3>Case 1: Blocked-In LNG Transfer Line Thermal Relief Valve<\/h3>\r\n          <span class=\"zobai-lng-case-tag\">Thermal Relief<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lng-case-data\">\r\n          <div><b>Protected equipment:<\/b> LNG transfer line between isolation valves<\/div>\r\n          <div><b>Medium:<\/b> LNG, cold methane vapor and flashing liquid<\/div>\r\n          <div><b>Service temperature:<\/b> Cryogenic LNG temperature<\/div>\r\n          <div><b>Set pressure:<\/b> Below protected piping design pressure<\/div>\r\n          <div><b>Relief cause:<\/b> Heat leak into blocked-in liquid section<\/div>\r\n          <div><b>Required data:<\/b> Trapped volume, pipe size, insulation, heat leak and design pressure<\/div>\r\n          <div><b>Discharge:<\/b> Return to tank, cold vent, BOG header or approved safe system<\/div>\r\n          <div><b>Key review:<\/b> Flashing, cold discharge, icing, seat tightness and thermal cycling<\/div>\r\n        <\/div>\r\n        <p>\r\n          Blocked-in LNG thermal relief is often small in flow but severe in pressure rise. The discharge route must remain open and suitable for cold flashing liquid or vapor.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-case zobai-lng-span-6\">\r\n        <div class=\"zobai-lng-case-top\">\r\n          <h3>Case 2: LNG Storage Tank Pressure Relief Valve<\/h3>\r\n          <span class=\"zobai-lng-case-tag\">Storage Tank Relief<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lng-case-data\">\r\n          <div><b>Protected equipment:<\/b> LNG storage tank vapor space<\/div>\r\n          <div><b>Medium:<\/b> Boil-off gas, methane-rich vapor and nitrogen traces<\/div>\r\n          <div><b>Design pressure:<\/b> Tank datasheet value<\/div>\r\n          <div><b>Set pressure:<\/b> Tank protection set point<\/div>\r\n          <div><b>Relief cause:<\/b> Normal boil-off, blocked vapor outlet, rollover scenario or emergency case<\/div>\r\n          <div><b>Required data:<\/b> Tank volume, BOG rate, emergency venting basis and vapor composition<\/div>\r\n          <div><b>Discharge:<\/b> Vent stack, flare, BOG system or approved tank relief system<\/div>\r\n          <div><b>Key review:<\/b> Low-pressure capacity, icing, safe vent location, vacuum protection and redundancy<\/div>\r\n        <\/div>\r\n        <p>\r\n          LNG tank relief devices should be coordinated with boil-off gas handling, vacuum protection and emergency venting. Overpressure and vacuum protection should not be treated separately.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-case zobai-lng-span-6\">\r\n        <div class=\"zobai-lng-case-top\">\r\n          <h3>Case 3: LNG Pump Discharge Safety Valve<\/h3>\r\n          <span class=\"zobai-lng-case-tag\">Pump Protection<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lng-case-data\">\r\n          <div><b>Protected equipment:<\/b> LNG pump discharge header<\/div>\r\n          <div><b>Medium:<\/b> LNG and cold methane-rich vapor<\/div>\r\n          <div><b>Design pressure:<\/b> Pump discharge piping rating<\/div>\r\n          <div><b>Set pressure:<\/b> Below discharge line protection limit<\/div>\r\n          <div><b>Relief cause:<\/b> Pump deadhead, blocked outlet or minimum flow failure<\/div>\r\n          <div><b>Required data:<\/b> Pump curve, shutoff head, maximum flow and recirculation route<\/div>\r\n          <div><b>Discharge:<\/b> Pump suction, tank return, BOG header or safe cold relief line<\/div>\r\n          <div><b>Key review:<\/b> Liquid relief capacity, flashing, vibration, low-temperature material and return pressure<\/div>\r\n        <\/div>\r\n        <p>\r\n          LNG pump relief requires pump curve review and cryogenic discharge planning. A normal liquid relief valve may not be suitable without low-temperature material and seat review.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-case zobai-lng-span-6\">\r\n        <div class=\"zobai-lng-case-top\">\r\n          <h3>Case 4: LNG Vaporizer Outlet Safety Valve<\/h3>\r\n          <span class=\"zobai-lng-case-tag\">Regasification<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lng-case-data\">\r\n          <div><b>Protected equipment:<\/b> Vaporizer outlet gas header<\/div>\r\n          <div><b>Medium:<\/b> Natural gas, methane-rich vapor and possible cold gas<\/div>\r\n          <div><b>Set pressure:<\/b> Below downstream gas header design pressure<\/div>\r\n          <div><b>Relief cause:<\/b> Gas outlet blockage, regulator failure or heat input upset<\/div>\r\n          <div><b>Required data:<\/b> LNG flow, vaporizer duty, outlet pressure and gas temperature<\/div>\r\n          <div><b>Discharge:<\/b> Vent stack, flare, fuel gas header or approved relief header<\/div>\r\n          <div><b>Valve review:<\/b> Gas PSV or pilot operated valve where suitable<\/div>\r\n          <div><b>Key review:<\/b> Cold gas, capacity, back pressure, noise and safe gas dispersion<\/div>\r\n        <\/div>\r\n        <p>\r\n          Vaporizer relief may involve cold gas or warm natural gas depending on upset condition. Outlet temperature and gas composition should be included in the datasheet.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-case zobai-lng-span-6\">\r\n        <div class=\"zobai-lng-case-top\">\r\n          <h3>Case 5: BOG Compressor Discharge Safety Valve<\/h3>\r\n          <span class=\"zobai-lng-case-tag\">BOG Compressor<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lng-case-data\">\r\n          <div><b>Protected equipment:<\/b> BOG compressor discharge line and receiver<\/div>\r\n          <div><b>Medium:<\/b> Boil-off gas, methane-rich gas and possible nitrogen<\/div>\r\n          <div><b>Set pressure:<\/b> Compressor discharge system protection value<\/div>\r\n          <div><b>Relief cause:<\/b> Blocked discharge, recycle failure or compressor control failure<\/div>\r\n          <div><b>Required data:<\/b> Compressor map, maximum flow, suction temperature and discharge pressure<\/div>\r\n          <div><b>Discharge:<\/b> Flare, vent stack, fuel gas system or recycle arrangement<\/div>\r\n          <div><b>Valve review:<\/b> Gas PSV or pilot operated safety valve for clean gas<\/div>\r\n          <div><b>Key review:<\/b> Leakage tightness, vibration, pulsation, cold start condition and back pressure<\/div>\r\n        <\/div>\r\n        <p>\r\n          BOG compressor relief should be selected from compressor maximum credible flow, not normal BOG rate only. Vent or flare system back pressure must be checked.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-case zobai-lng-span-6\">\r\n        <div class=\"zobai-lng-case-top\">\r\n          <h3>Case 6: LNG Bunkering Skid Relief Valve<\/h3>\r\n          <span class=\"zobai-lng-case-tag\">Marine \/ Bunkering<\/span>\r\n        <\/div>\r\n        <div class=\"zobai-lng-case-data\">\r\n          <div><b>Protected equipment:<\/b> LNG bunkering skid, loading hose or fuel gas package<\/div>\r\n          <div><b>Medium:<\/b> LNG, cold vapor and natural gas<\/div>\r\n          <div><b>Set pressure:<\/b> Skid piping or hose protection value<\/div>\r\n          <div><b>Relief cause:<\/b> Blocked transfer, trapped LNG expansion, ESD closure or hose isolation<\/div>\r\n          <div><b>Required data:<\/b> Transfer flow, pipe volume, ESD sequence and discharge philosophy<\/div>\r\n          <div><b>Discharge:<\/b> Tank return, vent mast, BOG header or approved safe relief path<\/div>\r\n          <div><b>Valve review:<\/b> Cryogenic thermal relief valve and gas PSV combination where required<\/div>\r\n          <div><b>Key review:<\/b> Compact layout, cold plume, operator safety, insulation clearance and maintenance access<\/div>\r\n        <\/div>\r\n        <p>\r\n          LNG bunkering skids need clear discharge philosophy because emergency shutdown can isolate cold liquid sections. Thermal relief and gas relief should be coordinated.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section\">\r\n    <div class=\"zobai-lng-eyebrow\">Service Data Matrix<\/div>\r\n    <h2 class=\"zobai-lng-title\">LNG Safety Valve Data Matrix<\/h2>\r\n\r\n    <div class=\"zobai-lng-table-wrap\">\r\n      <table class=\"zobai-lng-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>LNG Service<\/th>\r\n            <th>Typical Medium<\/th>\r\n            <th>Common Relief Cause<\/th>\r\n            <th>Required Engineering Check<\/th>\r\n            <th>Recommended Valve Review<\/th>\r\n            <th>Risk if Missed<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Blocked-in LNG line<\/td>\r\n            <td>LNG, flashing methane-rich liquid, cold vapor<\/td>\r\n            <td>Thermal expansion from heat leak into isolated liquid<\/td>\r\n            <td>Trapped volume, heat leak, set pressure, discharge route and flashing behavior<\/td>\r\n            <td>Cryogenic thermal relief valve with suitable seat and low-temperature materials<\/td>\r\n            <td>Rapid overpressure, cold liquid release or valve leakage after thermal cycling<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>LNG storage tank<\/td>\r\n            <td>Boil-off gas, methane vapor, nitrogen traces<\/td>\r\n            <td>BOG generation, blocked vapor outlet, emergency venting case<\/td>\r\n            <td>Tank design pressure, BOG rate, low-pressure capacity, vacuum protection and safe venting<\/td>\r\n            <td>Tank pressure\/vacuum relief system and certified low-pressure relief device<\/td>\r\n            <td>Tank overpressure, vacuum damage, unsafe vapor release or icing blockage<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>LNG pump discharge<\/td>\r\n            <td>LNG, cold liquid methane mixture, flashing liquid<\/td>\r\n            <td>Pump deadhead, blocked discharge, minimum flow failure<\/td>\r\n            <td>Pump curve, shutoff head, cold liquid capacity, return pressure and vibration<\/td>\r\n            <td>Cryogenic liquid relief valve or spring-loaded cryogenic PSV<\/td>\r\n            <td>Pump damage, line rupture, unstable relief or unsafe return discharge<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Vaporizer outlet<\/td>\r\n            <td>Natural gas, cold methane-rich gas, warm gas<\/td>\r\n            <td>Gas outlet blockage, heat input upset, regulator failure<\/td>\r\n            <td>Gas capacity, outlet temperature, downstream design pressure and vent dispersion<\/td>\r\n            <td>Gas PSV or pilot operated valve for clean gas where suitable<\/td>\r\n            <td>Downstream overpressure, high noise or unsafe gas plume<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>BOG compressor<\/td>\r\n            <td>Boil-off gas, methane-rich gas, nitrogen traces<\/td>\r\n            <td>Blocked discharge, recycle failure, compressor control failure<\/td>\r\n            <td>Compressor map, maximum flow, pulsation, vibration and back pressure<\/td>\r\n            <td>Gas PSV or pilot operated safety valve with leakage review<\/td>\r\n            <td>Compressor receiver overpressure, leakage or unstable relief<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>LNG loading \/ bunkering skid<\/td>\r\n            <td>LNG, cold vapor, natural gas<\/td>\r\n            <td>Trapped LNG, blocked transfer, ESD isolation<\/td>\r\n            <td>ESD sequence, trapped volume, transfer flow, discharge philosophy and operator safety<\/td>\r\n            <td>Cryogenic thermal relief plus gas PSV arrangement where required<\/td>\r\n            <td>Overpressure after isolation, cold plume exposure or blocked relief path<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section zobai-lng-section-soft\">\r\n    <div class=\"zobai-lng-eyebrow\">Selection Framework<\/div>\r\n    <h2 class=\"zobai-lng-title\">How to Specify an LNG Safety Valve Correctly<\/h2>\r\n\r\n    <div class=\"zobai-lng-grid\">\r\n      <div class=\"zobai-lng-card zobai-lng-span-6\">\r\n        <h3>1. Confirm whether the relief case is liquid, vapor or flashing flow<\/h3>\r\n        <p>\r\n          LNG systems may relieve cold liquid, boil-off gas, warm natural gas, flashing liquid or two-phase flow. Valve type, capacity, outlet piping and discharge destination should be selected from the actual relieving phase.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-6\">\r\n        <h3>2. Select materials for cryogenic toughness<\/h3>\r\n        <p>\r\n          Body, bonnet, nozzle, disc, stem, spring, bolting, seat, gasket and trim should be suitable for cryogenic temperature. Low-temperature impact requirements, stainless steel grades and project material specifications should be confirmed before quotation.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-6\">\r\n        <h3>3. Review extended bonnet and cold box installation<\/h3>\r\n        <p>\r\n          Cryogenic valves may need extended bonnets to protect spring and packing areas from extreme cold. Cold box penetration, insulation thickness, valve orientation and maintenance access should be checked in the layout stage.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-6\">\r\n        <h3>4. Check discharge route and back pressure<\/h3>\r\n        <p>\r\n          Relief may discharge to tank return, BOG header, flare, vent stack, cold vent or safe drain system. Back pressure, freezing, condensation, cold plume, ignition risk and oxygen-deficient atmosphere risk should be reviewed.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-6\">\r\n        <h3>5. Confirm thermal relief for every blocked-in LNG section<\/h3>\r\n        <p>\r\n          LNG trapped in isolated piping can create severe pressure rise. Transfer lines, loading arms, pump discharge lines, vaporizer inlets and bypass sections should be checked for thermal relief coverage.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-6\">\r\n        <h3>6. Define cryogenic testing and documents<\/h3>\r\n        <p>\r\n          LNG projects commonly require material certificates, low-temperature material confirmation, pressure test records, set pressure calibration, seat tightness test, cleaning records and project-specific inspection documents.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section\">\r\n    <div class=\"zobai-lng-eyebrow\">Installation & Discharge<\/div>\r\n    <h2 class=\"zobai-lng-title\">LNG Relief Valves Must Be Reviewed With Insulation, Cold Discharge, Back Pressure and Safe Venting<\/h2>\r\n\r\n    <div class=\"zobai-lng-grid\">\r\n      <div class=\"zobai-lng-card zobai-lng-span-7\">\r\n        <h3>Why LNG relief valve installation controls real performance<\/h3>\r\n        <p>\r\n          LNG relief performance depends on the full cryogenic system. A correctly sized valve can still fail if the inlet line is too long, the discharge line freezes, insulation blocks inspection, cold liquid pockets remain trapped, or the outlet is routed toward personnel, ignition sources, air intakes or enclosed areas.\r\n        <\/p>\r\n        <p>\r\n          Installation should review short inlet path, valve orientation, cold box interface, insulation clearance, bonnet warming, outlet support, thermal contraction, safe vent elevation, cold plume direction, ice formation, drainability, flare or BOG header back pressure, ESD isolation sequence, maintenance access and whether the discharge route can handle cold liquid, vapor or flashing two-phase flow.\r\n        <\/p>\r\n        <div class=\"zobai-lng-chip-row\">\r\n          <span class=\"zobai-lng-chip\">Cryogenic Service<\/span>\r\n          <span class=\"zobai-lng-chip\">Thermal Relief<\/span>\r\n          <span class=\"zobai-lng-chip\">Boil-Off Gas<\/span>\r\n          <span class=\"zobai-lng-chip\">Extended Bonnet<\/span>\r\n          <span class=\"zobai-lng-chip\">Flashing LNG<\/span>\r\n          <span class=\"zobai-lng-chip\">Cold Venting<\/span>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-5\">\r\n        <h3>Field installation checks<\/h3>\r\n        <ul class=\"zobai-lng-list\">\r\n          <li>Confirm set pressure, protected equipment MAWP and cryogenic temperature rating.<\/li>\r\n          <li>Check every blocked-in LNG section for thermal relief coverage.<\/li>\r\n          <li>Keep inlet pressure loss within the project design limit.<\/li>\r\n          <li>Route cold liquid, flashing LNG and gas discharge to approved safe systems.<\/li>\r\n          <li>Review outlet back pressure from vent stack, BOG header, tank return or flare system.<\/li>\r\n          <li>Protect personnel from cold plume, frostbite risk, oxygen-deficient atmosphere and ignition hazards.<\/li>\r\n          <li>Provide insulation clearance, tag visibility, inspection access and safe valve removal space.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section zobai-lng-section-soft\">\r\n    <div class=\"zobai-lng-eyebrow\">Standards & Documentation<\/div>\r\n    <h2 class=\"zobai-lng-title\">Standards and Documents to Confirm Before Ordering<\/h2>\r\n\r\n    <div class=\"zobai-lng-grid\">\r\n      <div class=\"zobai-lng-card zobai-lng-span-6\">\r\n        <h3>Common LNG relief references<\/h3>\r\n        <p>\r\n          LNG safety valve specifications may reference NFPA, ASME, API, ISO, EN, GB, local LNG terminal regulations, marine rules, owner cryogenic piping standards and project-specific relief philosophy. The applicable design basis should be confirmed before quotation.\r\n        <\/p>\r\n        <ul class=\"zobai-lng-list\">\r\n          <li><a href=\"\/standards\/nfpa-59a\/\">NFPA 59A<\/a> where LNG production, storage and handling requirements are specified by the project.<\/li>\r\n          <li><a href=\"\/standards\/api-520\/\">API 520<\/a> for pressure-relieving device sizing and selection reference where required.<\/li>\r\n          <li><a href=\"\/standards\/api-521\/\">API 521<\/a> for pressure-relieving and depressuring system review, flare, venting and system-level relief cases.<\/li>\r\n          <li><a href=\"\/standards\/asme-section-viii\/\">ASME BPVC Section VIII<\/a> where protected vessels, receivers, vaporizers or separators are pressure vessels.<\/li>\r\n          <li><a href=\"\/standards\/asme-b31-3\/\">ASME B31.3<\/a> where LNG process piping or cryogenic plant piping is specified under process piping rules.<\/li>\r\n          <li><a href=\"\/standards\/api-526\/\">API 526<\/a> when flanged steel pressure relief valve dimensions and pressure classes are specified.<\/li>\r\n          <li><a href=\"\/standards\/api-527\/\">API 527<\/a> when seat tightness testing is required by project specification.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-6\">\r\n        <h3>Typical LNG valve document package<\/h3>\r\n        <p>\r\n          Documentation should be agreed before manufacturing, especially for LNG terminals, regasification skids, BOG compressors, marine bunkering, truck loading and EPC export projects.\r\n        <\/p>\r\n        <ul class=\"zobai-lng-list\">\r\n          <li>Technical datasheet with tag number, model, size, orifice, set pressure and connection.<\/li>\r\n          <li>Sizing calculation or certified relieving capacity confirmation.<\/li>\r\n          <li>Cryogenic temperature basis, LNG composition and relieving phase statement.<\/li>\r\n          <li>Material certificates for body, bonnet, nozzle, disc, stem, spring and pressure-retaining parts.<\/li>\r\n          <li>Low-temperature material confirmation or impact test documentation where specified.<\/li>\r\n          <li>Set pressure calibration certificate, pressure test report and seat tightness test report.<\/li>\r\n          <li>Cleaning, degreasing, drying, packing and preservation records where required.<\/li>\r\n          <li>General arrangement drawing with extended bonnet, insulation clearance, weight and discharge orientation.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section\">\r\n    <div class=\"zobai-lng-eyebrow\">RFQ Checklist<\/div>\r\n    <h2 class=\"zobai-lng-title\">LNG Safety Valve RFQ Data Checklist<\/h2>\r\n\r\n    <div class=\"zobai-lng-table-wrap\">\r\n      <table class=\"zobai-lng-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>Required Data<\/th>\r\n            <th>Why It Matters<\/th>\r\n            <th>Example Input<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>Protected equipment<\/td>\r\n            <td>Defines pressure boundary, code basis and set pressure limit.<\/td>\r\n            <td>LNG tank, transfer line, pump discharge, vaporizer, BOG compressor, loading skid<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>MAWP \/ design pressure<\/td>\r\n            <td>Defines the maximum pressure the valve must protect.<\/td>\r\n            <td>Low-pressure tank value, 10 barg, 16 barg, 40 barg, Class 150\/300 piping<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Set pressure<\/td>\r\n            <td>Defines valve opening pressure and capacity basis.<\/td>\r\n            <td>Tank set point, line protection value, pump discharge protection set pressure<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Relief scenario<\/td>\r\n            <td>Determines required capacity and phase behavior.<\/td>\r\n            <td>Blocked-in LNG, BOG generation, pump deadhead, vaporizer outlet blockage, fire case<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Medium and phase<\/td>\r\n            <td>Affects sizing, material, discharge design and valve configuration.<\/td>\r\n            <td>LNG liquid, flashing LNG, boil-off gas, cold natural gas, warm natural gas, two-phase flow<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>LNG composition<\/td>\r\n            <td>Affects molecular weight, boiling behavior, density and relief calculation.<\/td>\r\n            <td>Methane-rich LNG with ethane, propane, nitrogen and heavier components<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Relieving temperature<\/td>\r\n            <td>Controls cryogenic material selection, bonnet design and seat compatibility.<\/td>\r\n            <td>Cryogenic LNG temperature, cold gas temperature, vaporizer outlet temperature<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Required capacity<\/td>\r\n            <td>Confirms whether the valve can protect the system.<\/td>\r\n            <td>kg\/h, Nm\u00b3\/h, SCFM, boil-off rate, pump curve, thermal expansion basis<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Back pressure and discharge route<\/td>\r\n            <td>Influences capacity, stability, safety and valve configuration.<\/td>\r\n            <td>Tank return, BOG header, flare, vent stack, cold vent, fuel gas system<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Installation condition<\/td>\r\n            <td>Affects extended bonnet, insulation clearance and maintenance access.<\/td>\r\n            <td>Cold box, outdoor line, insulated piping, loading arm, marine skid, vertical installation<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Material requirement<\/td>\r\n            <td>Prevents brittle failure, leakage and document rejection.<\/td>\r\n            <td>316SS, CF8M, low-temperature stainless steel, extended bonnet, PTFE\/PCTFE seat where suitable<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>Required documents<\/td>\r\n            <td>Avoids inspection, FAT, shipment and commissioning delays.<\/td>\r\n            <td>Datasheet, drawing, MTC, low-temperature material record, sizing report, calibration report<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"zobai-lng-note\">\r\n      Final selection must be confirmed by LNG composition, protected equipment datasheet, cryogenic temperature, relief scenario, required capacity, applicable code, back pressure calculation, certified valve capacity and engineering review.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section zobai-lng-section-soft\">\r\n    <div class=\"zobai-lng-eyebrow\">Selection Errors<\/div>\r\n    <h2 class=\"zobai-lng-title\">Common LNG Safety Valve Selection Mistakes<\/h2>\r\n\r\n    <div class=\"zobai-lng-grid\">\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>Treating LNG like ordinary natural gas<\/h3>\r\n        <p>\r\n          LNG relief may involve cryogenic liquid, flashing flow or very cold vapor. A standard natural gas PSV may not have suitable materials, bonnet design or seat performance for LNG service.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>Missing blocked-in liquid thermal relief<\/h3>\r\n        <p>\r\n          Any isolated LNG section can overpressure when heat enters the line. Loading arms, bypasses, pump lines and vaporizer inlet lines should be checked for thermal relief.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>Ignoring flashing and two-phase relief<\/h3>\r\n        <p>\r\n          LNG can flash as pressure drops. The valve and discharge line should be reviewed for phase change, icing, cold plume behavior and safe outlet routing.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>Using unsuitable low-temperature materials<\/h3>\r\n        <p>\r\n          Cryogenic service requires material toughness review. Body, trim, bolting, spring, gasket and seat materials should match the specified low-temperature condition.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>Forgetting insulation and bonnet clearance<\/h3>\r\n        <p>\r\n          Insulation can block nameplates, levers, vents and maintenance access. Extended bonnet and cold box details should be reviewed before layout is finalized.\r\n        <\/p>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-card zobai-lng-span-4\">\r\n        <h3>Discharging cold vapor into unsafe areas<\/h3>\r\n        <p>\r\n          LNG relief can produce cold vapor clouds and oxygen-deficient atmosphere risk. Vent discharge should be routed to approved safe locations away from personnel and ignition sources.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section\">\r\n    <div class=\"zobai-lng-eyebrow\">Related Engineering Resources<\/div>\r\n    <h2 class=\"zobai-lng-title\">Continue Your LNG Relief Valve Selection Review<\/h2>\r\n    <p class=\"zobai-lng-lead\">\r\n      These related pages help move from LNG relief requirements to detailed cryogenic valve selection, sizing, thermal relief, high back pressure review, storage tank protection and complete RFQ preparation.\r\n    <\/p>\r\n\r\n    <div class=\"zobai-lng-link-grid\">\r\n      <a class=\"zobai-lng-link-card\" href=\"\/engineering\/safety-valve-selection-guide\/\">\r\n        <strong>Safety Valve Selection Guide<\/strong>\r\n        <span>Step-by-step guidance for selecting safety valves by medium, pressure, capacity, material and installation condition.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lng-link-card\" href=\"\/engineering\/safety-valve-sizing\/\">\r\n        <strong>Safety Valve Sizing<\/strong>\r\n        <span>Review capacity, set pressure, back pressure, cryogenic phase behavior and sizing inputs before RFQ.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lng-link-card\" href=\"\/products\/cryogenic-safety-valves\/\">\r\n        <strong>Cryogenic Safety Valves<\/strong>\r\n        <span>For LNG, liquid nitrogen, liquid oxygen, cold gas, low-temperature piping and extended bonnet designs.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lng-link-card\" href=\"\/applications\/thermal-relief\/\">\r\n        <strong>Thermal Relief Valves<\/strong>\r\n        <span>For blocked-in LNG, cryogenic transfer lines, isolated liquid sections and heat leak pressure rise.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lng-link-card\" href=\"\/applications\/high-back-pressure\/\">\r\n        <strong>High Back Pressure Service<\/strong>\r\n        <span>For LNG relief valves connected to BOG headers, flare systems, tank returns and cold vent systems.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lng-link-card\" href=\"\/applications\/low-temperature\/\">\r\n        <strong>Low Temperature Safety Valves<\/strong>\r\n        <span>For cryogenic materials, low-temperature toughness, cold gas, freezing risk and testing documents.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lng-link-card\" href=\"\/equipment\/storage-tanks\/\">\r\n        <strong>Storage Tank Safety Valves<\/strong>\r\n        <span>For LNG tank pressure relief, vacuum protection, emergency venting and boil-off gas systems.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lng-link-card\" href=\"\/equipment\/compressors\/\">\r\n        <strong>Compressor Safety Valves<\/strong>\r\n        <span>For BOG compressor discharge, recycle failure, vibration, pulsation and gas venting review.<\/span>\r\n      <\/a>\r\n\r\n      <a class=\"zobai-lng-link-card\" href=\"\/equipment\/skid-systems\/\">\r\n        <strong>Skid System Safety Valves<\/strong>\r\n        <span>For LNG bunkering skids, fuel gas packages, regasification skids and compact cryogenic layouts.<\/span>\r\n      <\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section zobai-lng-section-soft\">\r\n    <div class=\"zobai-lng-eyebrow\">FAQ<\/div>\r\n    <h2 class=\"zobai-lng-title\">LNG Safety Valve FAQ<\/h2>\r\n\r\n    <div class=\"zobai-lng-accordion\" data-zobai-lng-accordion>\r\n      <div class=\"zobai-lng-acc-item is-open\">\r\n        <button class=\"zobai-lng-acc-btn\" type=\"button\">What is the most common LNG relief valve application? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lng-acc-body\">\r\n          A common application is thermal relief for blocked-in LNG piping. LNG trapped between closed valves can build pressure as heat leaks into the line, so cryogenic thermal relief valves are often required on isolated liquid sections.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-acc-item\">\r\n        <button class=\"zobai-lng-acc-btn\" type=\"button\">Can a standard natural gas safety valve be used for LNG? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lng-acc-body\">\r\n          Not automatically. LNG service requires cryogenic material review, low-temperature seat compatibility, possible extended bonnet design, flashing flow review and safe cold discharge routing.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-acc-item\">\r\n        <button class=\"zobai-lng-acc-btn\" type=\"button\">Why is an extended bonnet used on LNG safety valves? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lng-acc-body\">\r\n          An extended bonnet helps protect spring, packing and upper valve components from extreme cold. It is commonly reviewed for cryogenic liquid service, insulated piping and cold box installations.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-acc-item\">\r\n        <button class=\"zobai-lng-acc-btn\" type=\"button\">What data is required for an LNG safety valve quotation? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lng-acc-body\">\r\n          Provide protected equipment, MAWP or design pressure, set pressure, LNG composition, relieving phase, relieving temperature, relief scenario, required capacity, back pressure, discharge route, installation condition, material requirement and required documents.\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-acc-item\">\r\n        <button class=\"zobai-lng-acc-btn\" type=\"button\">Where should LNG safety valve discharge be routed? <span>+<\/span><\/button>\r\n        <div class=\"zobai-lng-acc-body\">\r\n          LNG relief discharge should be routed to an approved safe destination such as a tank return, BOG header, flare, cold vent or vent stack depending on the project relief philosophy. Cold plume, ignition risk, back pressure and personnel exposure must be reviewed.\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"zobai-lng-section\">\r\n    <div class=\"zobai-lng-rfq\">\r\n      <div>\r\n        <div class=\"zobai-lng-eyebrow\">Engineering RFQ Support<\/div>\r\n        <h2>Prepare a Complete LNG Safety Valve Datasheet Before Quotation<\/h2>\r\n        <p>\r\n          Send the protected equipment datasheet, MAWP or design pressure, set pressure, LNG composition, relief scenario, required capacity, relieving phase, relieving temperature, blocked-in volume if applicable, back pressure, discharge route, installation condition, material requirement, extended bonnet requirement, connection standard and required documents. A complete datasheet helps confirm cryogenic compatibility, correct capacity and safe cold discharge.\r\n        <\/p>\r\n        <div class=\"zobai-lng-btn-row\">\r\n          <a class=\"zobai-lng-btn zobai-lng-btn-primary\" href=\"\/contact\/\">Request Engineering Quote<\/a>\r\n          <a class=\"zobai-lng-btn zobai-lng-btn-secondary\" href=\"\/ask-an-engineer\/\">Ask an Engineer<\/a>\r\n          <a class=\"zobai-lng-btn zobai-lng-btn-secondary\" href=\"\/catalog-pdf\/\">Download Catalog PDF<\/a>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"zobai-lng-rfq-box\">\r\n        <h3>Minimum RFQ data<\/h3>\r\n        <div class=\"zobai-lng-rfq-grid\">\r\n          <div class=\"zobai-lng-rfq-item\">Protected Equipment<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">MAWP \/ Design Pressure<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">Set Pressure<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">Relief Scenario<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">Required Capacity<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">LNG Composition<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">Relieving Phase<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">Temperature<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">Back Pressure<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">Discharge Route<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">Material<\/div>\r\n          <div class=\"zobai-lng-rfq-item\">Documents<\/div>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n<\/div>\r\n\r\n<script>\r\n  (function () {\r\n    var accordions = document.querySelectorAll('[data-zobai-lng-accordion]');\r\n    accordions.forEach(function (accordion) {\r\n      var items = accordion.querySelectorAll('.zobai-lng-acc-item');\r\n\r\n      items.forEach(function (item) {\r\n        var button = item.querySelector('.zobai-lng-acc-btn');\r\n        button.addEventListener('click', function () {\r\n          var isOpen = item.classList.contains('is-open');\r\n\r\n          items.forEach(function (i) {\r\n            i.classList.remove('is-open');\r\n          });\r\n\r\n          if (!isOpen) {\r\n            item.classList.add('is-open');\r\n          }\r\n        });\r\n      });\r\n    });\r\n  })();\r\n<\/script>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What is the most common LNG relief valve application?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"A common application is thermal relief for blocked-in LNG piping. 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These featured models help buyers and engineers compare product directions across different service conditions.<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4366ae30 elementor-pagination-type-bullets elementor-arrows-position-inside elementor-pagination-position-outside cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-n-carousel\" data-id=\"4366ae30\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;carousel_items&quot;:[{&quot;slide_title&quot;:&quot;Slide #1&quot;,&quot;_id&quot;:&quot;01fe9a5&quot;},{&quot;slide_title&quot;:&quot;Slide #1&quot;,&quot;_id&quot;:&quot;945d82b&quot;},{&quot;slide_title&quot;:&quot;Slide #1&quot;,&quot;_id&quot;:&quot;8ec93bd&quot;},{&quot;slide_title&quot;:&quot;Slide #1&quot;,&quot;_id&quot;:&quot;ee987c2&quot;}],&quot;slides_to_show&quot;:&quot;4&quot;,&quot;slides_to_show_tablet&quot;:&quot;2&quot;,&quot;slides_to_show_mobile&quot;:&quot;1&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;autoplay_speed&quot;:5000,&quot;pause_on_hover&quot;:&quot;yes&quot;,&quot;pause_on_interaction&quot;:&quot;yes&quot;,&quot;infinite&quot;:&quot;yes&quot;,&quot;speed&quot;:500,&quot;offset_sides&quot;:&quot;none&quot;,&quot;arrows&quot;:&quot;yes&quot;,&quot;pagination&quot;:&quot;bullets&quot;,&quot;image_spacing_custom&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:10,&quot;sizes&quot;:[]},&quot;image_spacing_custom_widescreen&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;image_spacing_custom_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;image_spacing_custom_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-carousel.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-carousel swiper\" role=\"region\" aria-roledescription=\"carousel\" aria-label=\"Carousel\" dir=\"ltr\">\n\t\t\t<div class=\"swiper-wrapper\" aria-live=\"off\">\n\t\t\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" data-slide=\"1\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"1 sur 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1e8466d0 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"1e8466d0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-770aaed5 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"770aaed5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-4c1f2900 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"4c1f2900\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-130cc316 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"130cc316\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3c2e9242 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"3c2e9242\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"850\" height=\"850\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service.webp\" class=\"attachment-large size-large wp-image-51693\" alt=\"A46Y pilot-operated relief valve with external pilot tubing and flanged body\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service.webp 850w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-300x300.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-150x150.webp 150w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-768x768.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-260x260.webp 260w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3248e92c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"3248e92c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-1ec71408 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"1ec71408\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5494dcc5 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"5494dcc5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ZBA46 Series Pilot Operated Safety Valves<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2d39c79 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"2d39c79\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b612a cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"b612a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/zobai.com\/fr\/applications\/lng\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-377c9607 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"377c9607\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Pilot operated safety valves for higher-pressure service requiring tighter sealing and stable set pressure performance.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" data-slide=\"2\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"2 sur 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-155cac38 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"155cac38\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-5b139ae4 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"5b139ae4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-233512ac e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"233512ac\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-1036bf1a e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"1036bf1a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2b080a80 cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"2b080a80\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"850\" height=\"850\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure.webp\" class=\"attachment-large size-large wp-image-51697\" alt=\"WA42Y bellows-balanced full-lift safety valve with flanged connections\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure.webp 850w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure-300x300.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure-150x150.webp 150w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure-768x768.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/wa42y-bellows-balanced-full-lift-safety-valve-back-pressure-260x260.webp 260w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3146e6af e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"3146e6af\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-58d5c833 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"58d5c833\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-38050fec cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"38050fec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ZBWA42 Series Bellows Balanced Safety Valves<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6420732c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"6420732c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4dfc5661 cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"4dfc5661\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/zobai.com\/fr\/applications\/lng\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-370ab435 cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"370ab435\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Bellows balanced safety valves for back pressure applications where stable performance is important.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" data-slide=\"3\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"3 sur 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-68e8d89 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"68e8d89\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-647c77e3 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"647c77e3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-6f51d657 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"6f51d657\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-4891b347 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"4891b347\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-751014ef cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"751014ef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"850\" height=\"850\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service.webp\" class=\"attachment-large size-large wp-image-51693\" alt=\"A46Y pilot-operated relief valve with external pilot tubing and flanged body\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service.webp 850w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-300x300.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-150x150.webp 150w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-768x768.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/a46y-pilot-operated-relief-valve-high-pressure-service-260x260.webp 260w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-31629a1b e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"31629a1b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-156da6fe e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"156da6fe\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3459e88b cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"3459e88b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ZBA68 Series High Temperature Steam Safety Valves<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-24fdc530 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"24fdc530\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1e7d55d1 cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"1e7d55d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/zobai.com\/fr\/applications\/lng\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4430443c cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"4430443c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>High temperature steam safety valves for boilers, steam lines, and other elevated-temperature systems.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" data-slide=\"4\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"4 sur 4\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4d9d040 e-flex e-con-boxed cmsmasters-block-default e-con e-child\" data-id=\"4d9d040\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-ac9437b e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"ac9437b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-6801ebde e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"6801ebde\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-177c4d86 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"177c4d86\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-409f65f cmsmasters-clip-path-yes cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-image\" data-id=\"409f65f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"850\" height=\"850\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system.webp\" class=\"attachment-large size-large wp-image-51695\" alt=\"SVL488 stainless steel safety valve for cleaning systems with sanitary clamp connection and lifting lever\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system.webp 850w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system-300x300.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system-150x150.webp 150w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system-768x768.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/04\/svl488-stainless-steel-safety-valve-cleaning-system-260x260.webp 260w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-488cd74c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"488cd74c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-79148685 e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"79148685\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5be42a9d cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-heading\" data-id=\"5be42a9d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SVL488 Series Sanitary Safety Valves<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-70f8922c e-con-full e-flex cmsmasters-block-default e-con e-child\" data-id=\"70f8922c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-39823ae cmsmasters-effect cmsmasters-effect-type-transform cmsmasters-effect-hover-type-element cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-button\" data-id=\"39823ae\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;cms_transform_hover_type&quot;:&quot;element&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/zobai.com\/fr\/applications\/lng\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"cmsmsdemo-icon- cmsms-demo-icon-arrows-1\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-443eadaa cmsmasters-block-default cmsmasters-sticky-default elementor-widget elementor-widget-text-editor\" data-id=\"443eadaa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Sanitary safety valves for hygienic process lines and cleaning systems requiring cleanable pressure protection.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<div class=\"elementor-swiper-button elementor-swiper-button-prev\" role=\"button\" tabindex=\"0\" aria-label=\"Pr\u00e9c\u00e9dent\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-chevron-left\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M646 125C629 125 613 133 604 142L308 442C296 454 292 471 292 487 292 504 296 521 308 533L604 854C617 867 629 875 646 875 663 875 679 871 692 858 704 846 713 829 713 812 713 796 708 779 692 767L438 487 692 225C700 217 708 204 708 187 708 171 704 154 692 142 675 129 663 125 646 125Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t\t<div class=\"elementor-swiper-button elementor-swiper-button-next\" role=\"button\" tabindex=\"0\" aria-label=\"Suivant\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-eicon-chevron-right\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M696 533C708 521 713 504 713 487 713 471 708 454 696 446L400 146C388 133 375 125 354 125 338 125 325 129 313 142 300 154 292 171 292 187 292 204 296 221 308 233L563 492 304 771C292 783 288 800 288 817 288 833 296 850 308 863 321 871 338 875 354 875 371 875 388 867 400 854L696 533Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t\t\t\t<div class=\"swiper-pagination\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Home LNG Safety Valves for Cryogenic Storage, Liquefaction, Regasification, BOG and Loading Systems CONTACT SALES LNG Cryogenic Relief Service LNG Safety Valves for Cryogenic Storage, Liquefaction, Regasification, BOG and Loading Systems LNG safety valves protect cryogenic storage tanks, LNG transfer lines, loading arms, unloading stations, LNG pumps, vaporizers, regasification skids, boil-off gas systems, BOG compressors,&#8230;<\/p>","protected":false},"author":2,"featured_media":0,"parent":52780,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-53221","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages\/53221","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/comments?post=53221"}],"version-history":[{"count":4,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages\/53221\/revisions"}],"predecessor-version":[{"id":53225,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages\/53221\/revisions\/53225"}],"up":[{"embeddable":true,"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/pages\/52780"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/fr\/wp-json\/wp\/v2\/media?parent=53221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}